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| 21. | Crowded conditions favour the spread of disease. |
| 拥挤的条件便于疾病传播。 |
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| 22. | The Black Death is the modern name given to the deadly bubonic plague,an epidemic disease spread by rat |
| 黑死病是指由鼠疫蚤传播的致命的淋巴腺鼠疫，是一种流行疾病，在14世纪传播了到欧洲。 |
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| 23. | The disease spread throughout the country, But from 1667 only sporadic cases appeared until 1679. " |
| 受害最惨重的是贫民密集的郊区,疫情迅速扩散到整个国家。但从1667年起到1679年为止,只有少数零星病例。 |
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| 24. | Disease can be spread by dirty tools, insects, inoculated soil. |
| 疾病也能由不干净的工具，昆虫，接种的土壤传播。 |
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| 25. | To our great relief, however, the disease hasn't spread to China. |
| 不过，使我们极感宽心的是，这种疫症没有蔓延到中国。 |
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| 26. | But, the disease has spread to Europe and the Middle East. |
| 但如今该病正在向欧洲和中东蔓延。 |
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| 27. | the spread of disease, knowledge, education |
| 疾病的蔓延、 知识的传播、 教育的普及 |
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| 28. | Epidemic hemorrhagic fever: it is a disease spread by mice and can be divided into field mice hemorrhagic |
| 钩端螺旋体病：该病具有多宿主性，其中与鼠类有关者占相当大的比例。 |
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| 29. | spread of disease process, development of disease |
| 传变 |
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| 30. | The disease is spread, and all children under 5 is at risk |
| 疾病正在蔓延,所有五岁以下的小孩都有被传染的危险 |
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